Image: Dave Johnston with gas-detection instrument at Mount St. Helens, 4 April 1980 (USGS) 1
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Description: Geologist Dave Johnston with gas-detection instrument at Mount St. Helens. Skamania County, Washington. April 4, 1980.
Title: Dave Johnston with gas-detection instrument at Mount St. Helens, 4 April 1980 (USGS) 1
Credit: [1] (USGS) – alternative ID number: msh00010
Author: Unknown (taken by or for the USGS)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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